behind the scenes

A lot happens behind the scenes to make a successful product launch look effortless.为了让一次成功的产品发布看起来毫不费力，幕后发生了很多事情。

She was quietly working behind the scenes to mediate between the two conflicting departments.她一直在默默地在幕后工作，以便在两个冲突的部门之间进行调解。